Early harvesting of rainfed plant cane to prevent heavy infestations of Eldana saccharina (Lepidoptera, Pyralidae) in Ferké Sugarcane plantations, Ivory Coast

Péné Crépin B., Coulibaly-Ouattara Yah, Boua Mélanie, Goebel François-Régis. 2019. Early harvesting of rainfed plant cane to prevent heavy infestations of Eldana saccharina (Lepidoptera, Pyralidae) in Ferké Sugarcane plantations, Ivory Coast. Jahrbuch der Österreichischen Gesellschaft für Agrarökonomie, 15 (3), 9 p.

https://www.sagepublisher.com/article/early-harvesting-of-rainfed-plant-cane-to-prevent-heavy-infestations-of-eldana-saccharina-lepidoptera-pyralidae-in-ferke-sugarcane-plantations-ivory-coast

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Résumé : The African stalk borer Eldana saccharina is an endemic pest of high economic importance in sub-Saharan Africa which often causes heavy infestations in rainfed plant cane subjected to a cycle of 15-17 months. The present study aimed to reduce overall damage due to this borer by early harvesting of sugarcane at three different periods. It involved two experiments carried out in Ferké 1 and Ferké 2 sugar estates over 17 months in rainfed plant cane, following a randomized complete block design (RCBD) with four different treatments. Treatments were composed of three harvesting periods (T1: November 15, T2: December 15, and T3: January 15), and a control (T0, no harvest), all in 4 replicates. The Ferké 1 experiment was planted with the variety N21 on 25/07/2017 and harvested on 23/06/2019. That of Ferké 2 was planted on 15/06/2017 with the variety M2592/93 and harvested on 05/12/2018. The study showed that variety N21 with high fiber content was more tolerant to stem borer than variety M2593/92 credited with a moderate fiber content. Stem borer infestations were significantly reduced across crop cycle following early harvesting on M2593/92, as opposed to N21. Without early harvesting, M2593/92 was much more infested than N21, with respectively 24 and 10% of internodes bored. Data showed that early harvesting in rainfed plant cane could be beneficial in the prevention of heavy infestations due to E saccharina.

Mots-clés Agrovoc : Eldana saccharina, insecte déprédateur des tiges, rendement des cultures, Saccharum officinarum, infestation, récolte, gestion intégrée des ravageurs, Saccharum, stress dû à la sécheresse, fertilisation, plantations, ravageur des plantes